I think the point the OP was making is don't fall into the trap that capital wants you to fall into. They pay you what they pay you because you are worth it, then then subtract quite a bunch of what you are worth because they employ tactics to do so. Sometimes it's as simple as offering you less and seeing if you'll balk.

Don't compare yourself with factory workers, compare your self with doctors and lawyers and you'll get a better appreciation of your negotiation position.